"National-Land Numerical Information based on JPGIS" is geo data provided by National Land Information Division, a section of National and Regional Policy Bureau(NRPB), Ministry of Land, Infrastructure, Transport and Tourism (MLIT), Japan

Contents

Licenses

Their terms of use is written in Japanese; a summary in English is as follows.

2-3. If you reproduce the National-Land Information or create derivative works, you must do a citation of the source (e.g., "「国土数値情報（○○データ） 国土交通省」", a literal translation, National-Land Numerical Information (XX Data), MLIT Japan).

3-1. You may use the National-Land Information free of charge.

3-5. Disclaimer. MLIT Japan makes no warranty on your use of the National-Land Information.

need discussion > concluded. see followings

OSMFJ confirmed using of KSJ2 to OSM（2012/July）

(Answer from MLIT)
No problem to import KSJ2 data into OSM. The source information is written to each Object as Tag(data attribution), and details are written on OSM wiki.(2012/12/02)

name, river code, river beginning point, river ending point.河川名、河川コード、河川始点、河川終点。

each prefecture各都道府県

done

Apr 2010

Oct 2011

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Sample of Tags

Tags below is a sample of the common tags to all of KSJ2 data. And this is a case of railway data 2007, so "type of data" (note, note:ja) and "url" (source_ref) should be adapted for each type of data.

Post Import Cleanup

Since I accidentially discovered several intersecting waterways in Japan I had a deeper look into the data.
I looked for intersections of ways tagged with
waterway=canal
waterway=drain
waterway=ditch
waterway=stream
waterway=river
with the tool waycheck20.pl. On the script I disabled not matching for layers since all the imported waterways I checked had generally a layer= tag from -1 to -3 on them regardless the reality (compared with Bing). The waterways I extracted from
japan.osm.pbf at geofabrik using osmfilter.
The result with 2670 intersections you can find here.
A cleanup by the importers would be nice.
It also would be interesting to check the other parts of the import but I leave that to other people. :)

An updated check I will only deliver on request since the script is quite slow. As you can see on bottom of the result page it took more then 80 hours to run.

Links

This software supports SHP format file, so you can view KSJ2 data as a image and check attributes of each object after you convert the KSJ2 data from xml to shape by KsjTool. You can use this free of charge.